Note: the project on Codeplex is only for SVN release and file download, it's not the project home.
The project home is
http://www.cpgf.org/
cpgf is a free, open source and cross platform C++ library. cpgf adds exciting features, including reflection (meta data), serialization, script binding, callbacks (signal and slot), into standard C++.
The goal of cpgf is to extend C++ language with lots of easy to use features, which are only available in other higher level languages such as C#, Java, or scripts, and absent in C++.